2 * This file is part of DisOrder
3 * Copyright (C) 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #include <sys/socket.h>
34 #include <sys/resource.h>
36 #include <arpa/inet.h>
44 #include "configuration.h"
50 #include "trackname.h"
51 #include "trackdb-int.h"
57 #define RESCAN "disorder-rescan"
58 #define DEADLOCK "disorder-deadlock"
60 static const char *getpart(const char *track,
65 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp);
66 static char **trackdb_new_tid(int *ntracksp,
69 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid);
71 const struct cache_type cache_files_type = { 86400 };
72 unsigned long cache_files_hits, cache_files_misses;
74 /* setup and teardown ********************************************************/
76 static const char *home; /* home had better not change */
77 DB_ENV *trackdb_env; /* db environment */
79 /** @brief The tracks database
80 * - Keys are UTF-8(NFC(unicode(path name)))
81 * - Values are encoded key-value pairs
82 * - Data is reconstructable data about tracks that currently exist
86 /** @brief The preferences database
88 * - Keys are UTF-8(NFC(unicode(path name)))
89 * - Values are encoded key-value pairs
90 * - Data is user data about tracks (that might not exist any more)
91 * and cannot be reconstructed
95 /** @brief The search database
97 * - Keys are UTF-8(NFKC(casefold(search term)))
98 * - Values are UTF-8(NFC(unicode(path name)))
99 * - There can be more than one value per key
100 * - Presence of key,value means that path matches the search terms
101 * - Only tracks fond in @ref tracks_tracksdb are represented here
102 * - This database can be reconstructed, it contains no user data
104 DB *trackdb_searchdb;
106 /** @brief The tags database
108 * - Keys are UTF-8(NFKC(casefold(tag)))
109 * - Values are UTF-8(NFC(unicode(path name)))
110 * - There can be more than one value per key
111 * - Presence of key,value means that path matches the tag
112 * - This is always in sync with the tags preference
113 * - This database can be reconstructed, it contains no user data
115 DB *trackdb_tagsdb; /* the tags database */
117 /** @brief The global preferences database
118 * - Keys are UTF-8(NFC(preference))
119 * - Values are global preference values
120 * - Data is user data and cannot be reconstructed
122 DB *trackdb_globaldb; /* global preferences */
124 /** @brief The noticed database
125 * - Keys are 64-bit big-endian timestamps
126 * - Values are UTF-8(NFC(unicode(path name)))
127 * - There can be more than one value per key
128 * - Presence of key,value means that path was added at the given time
129 * - Data cannot be reconstructed (but isn't THAT important)
131 DB *trackdb_noticeddb; /* when track noticed */
132 static pid_t db_deadlock_pid = -1; /* deadlock manager PID */
133 static pid_t rescan_pid = -1; /* rescanner PID */
134 static int initialized, opened; /* state */
136 /* tracks matched by required_tags */
137 static char **reqtracks;
138 static size_t nreqtracks;
140 /* comparison function for keys */
141 static int compare(DB attribute((unused)) *db_,
142 const DBT *a, const DBT *b) {
143 return compare_path_raw(a->data, a->size, b->data, b->size);
146 /* open environment */
147 void trackdb_init(int recover) {
149 static int recover_type[] = { 0, DB_RECOVER, DB_RECOVER_FATAL };
152 assert(initialized == 0);
155 if(strcmp(home, config->home))
156 fatal(0, "cannot change db home without server restart");
160 /* create environment */
161 if((err = db_env_create(&trackdb_env, 0))) fatal(0, "db_env_create: %s",
163 if((err = trackdb_env->set_alloc(trackdb_env,
164 xmalloc_noptr, xrealloc_noptr, xfree)))
165 fatal(0, "trackdb_env->set_alloc: %s", db_strerror(err));
166 if((err = trackdb_env->set_lk_max_locks(trackdb_env, 10000)))
167 fatal(0, "trackdb_env->set_lk_max_locks: %s", db_strerror(err));
168 if((err = trackdb_env->set_lk_max_objects(trackdb_env, 10000)))
169 fatal(0, "trackdb_env->set_lk_max_objects: %s", db_strerror(err));
170 if((err = trackdb_env->open(trackdb_env, config->home,
176 |recover_type[recover],
178 fatal(0, "trackdb_env->open %s: %s", config->home, db_strerror(err));
179 trackdb_env->set_errpfx(trackdb_env, "DB");
180 trackdb_env->set_errfile(trackdb_env, stderr);
181 trackdb_env->set_verbose(trackdb_env, DB_VERB_DEADLOCK, 1);
182 trackdb_env->set_verbose(trackdb_env, DB_VERB_RECOVERY, 1);
183 trackdb_env->set_verbose(trackdb_env, DB_VERB_REPLICATION, 1);
184 D(("initialized database environment"));
187 /* called when deadlock manager terminates */
188 static int reap_db_deadlock(ev_source attribute((unused)) *ev,
189 pid_t attribute((unused)) pid,
191 const struct rusage attribute((unused)) *rusage,
192 void attribute((unused)) *u) {
193 db_deadlock_pid = -1;
195 fatal(0, "deadlock manager unexpectedly terminated: %s",
198 D(("deadlock manager terminated: %s", wstat(status)));
202 static pid_t subprogram(ev_source *ev, const char *prog,
206 /* If we're in the background then trap subprocess stdout/stderr */
207 if(!(pid = xfork())) {
209 ev_signal_atfork(ev);
210 signal(SIGPIPE, SIG_DFL);
215 /* If we were negatively niced, undo it. We don't bother checking for
216 * error, it's not that important. */
217 setpriority(PRIO_PROCESS, 0, 0);
218 execlp(prog, prog, "--config", configfile,
219 debugging ? "--debug" : "--no-debug",
220 log_default == &log_syslog ? "--syslog" : "--no-syslog",
222 fatal(errno, "error invoking %s", prog);
227 /* start deadlock manager */
228 void trackdb_master(ev_source *ev) {
229 assert(db_deadlock_pid == -1);
230 db_deadlock_pid = subprogram(ev, DEADLOCK, -1);
231 ev_child(ev, db_deadlock_pid, 0, reap_db_deadlock, 0);
232 D(("started deadlock manager"));
235 /* close environment */
236 void trackdb_deinit(void) {
240 assert(initialized == 1);
243 /* close the environment */
244 if((err = trackdb_env->close(trackdb_env, 0)))
245 fatal(0, "trackdb_env->close: %s", db_strerror(err));
247 if(rescan_pid != -1 && kill(rescan_pid, SIGTERM) < 0)
248 fatal(errno, "error killing rescanner");
250 /* terminate the deadlock manager */
251 if(db_deadlock_pid != -1 && kill(db_deadlock_pid, SIGTERM) < 0)
252 fatal(errno, "error killing deadlock manager");
253 db_deadlock_pid = -1;
255 D(("deinitialized database environment"));
258 /* open a specific database */
259 static DB *open_db(const char *path,
267 D(("open %s", path));
268 path = config_get_file(path);
269 if((err = db_create(&db, trackdb_env, 0)))
270 fatal(0, "db_create %s: %s", path, db_strerror(err));
272 if((err = db->set_flags(db, dbflags)))
273 fatal(0, "db->set_flags %s: %s", path, db_strerror(err));
274 if(dbtype == DB_BTREE)
275 if((err = db->set_bt_compare(db, compare)))
276 fatal(0, "db->set_bt_compare %s: %s", path, db_strerror(err));
277 if((err = db->open(db, 0, path, 0, dbtype,
278 openflags | DB_AUTO_COMMIT, mode))) {
279 if((openflags & DB_CREATE) || errno != ENOENT)
280 fatal(0, "db->open %s: %s", path, db_strerror(err));
287 /* open track databases */
288 void trackdb_open(void) {
294 /* check the database version first */
295 trackdb_globaldb = open_db("global.db", 0, DB_HASH, 0, 0666);
296 if(trackdb_globaldb) {
297 /* This is an existing database */
298 const char *oldversion;
300 oldversion = trackdb_get_global("_dbversion");
303 if(strcmp(oldversion, DBVERSION)) {
304 /* This database needs upgrading. This isn't implemented yet so we just
306 fatal(0, "database needs upgrading from %s to %s", oldversion, DBVERSION);
309 /* Close the database again, we'll open it property below */
310 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
311 fatal(0, "error closing global.db: %s", db_strerror(err));
312 trackdb_globaldb = 0;
314 /* This is a brand new database */
317 /* open the databases */
318 trackdb_tracksdb = open_db("tracks.db",
319 DB_RECNUM, DB_BTREE, DB_CREATE, 0666);
320 trackdb_searchdb = open_db("search.db",
321 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
322 trackdb_tagsdb = open_db("tags.db",
323 DB_DUP|DB_DUPSORT, DB_HASH, DB_CREATE, 0666);
324 trackdb_prefsdb = open_db("prefs.db", 0, DB_HASH, DB_CREATE, 0666);
325 trackdb_globaldb = open_db("global.db", 0, DB_HASH, DB_CREATE, 0666);
326 trackdb_noticeddb = open_db("noticed.db",
327 DB_DUPSORT, DB_BTREE, DB_CREATE, 0666);
328 /* Stash the database version */
330 trackdb_set_global("_dbversion", DBVERSION, 0);
331 D(("opened databases"));
334 /* close track databases */
335 void trackdb_close(void) {
341 if((err = trackdb_tracksdb->close(trackdb_tracksdb, 0)))
342 fatal(0, "error closing tracks.db: %s", db_strerror(err));
343 if((err = trackdb_searchdb->close(trackdb_searchdb, 0)))
344 fatal(0, "error closing search.db: %s", db_strerror(err));
345 if((err = trackdb_tagsdb->close(trackdb_tagsdb, 0)))
346 fatal(0, "error closing tags.db: %s", db_strerror(err));
347 if((err = trackdb_prefsdb->close(trackdb_prefsdb, 0)))
348 fatal(0, "error closing prefs.db: %s", db_strerror(err));
349 if((err = trackdb_globaldb->close(trackdb_globaldb, 0)))
350 fatal(0, "error closing global.db: %s", db_strerror(err));
351 if((err = trackdb_noticeddb->close(trackdb_noticeddb, 0)))
352 fatal(0, "error closing noticed.db: %s", db_strerror(err));
353 trackdb_tracksdb = trackdb_searchdb = trackdb_prefsdb = 0;
354 trackdb_tagsdb = trackdb_globaldb = 0;
355 D(("closed databases"));
358 /* generic db routines *******************************************************/
360 /* fetch and decode a database entry. Returns 0, DB_NOTFOUND or
361 * DB_LOCK_DEADLOCK. */
362 int trackdb_getdata(DB *db,
369 switch(err = db->get(db, tid, make_key(&key, track),
370 prepare_data(&data), 0)) {
372 *kp = kvp_urldecode(data.data, data.size);
377 case DB_LOCK_DEADLOCK:
378 error(0, "error querying database: %s", db_strerror(err));
381 fatal(0, "error querying database: %s", db_strerror(err));
385 /* encode and store a database entry. Returns 0, DB_KEYEXIST or
386 * DB_LOCK_DEADLOCK. */
387 int trackdb_putdata(DB *db,
395 switch(err = db->put(db, tid, make_key(&key, track),
396 encode_data(&data, k), flags)) {
400 case DB_LOCK_DEADLOCK:
401 error(0, "error updating database: %s", db_strerror(err));
404 fatal(0, "error updating database: %s", db_strerror(err));
408 /* delete a database entry */
409 int trackdb_delkey(DB *db,
415 switch(err = db->del(db, tid, make_key(&key, track), 0)) {
419 case DB_LOCK_DEADLOCK:
420 error(0, "error updating database: %s", db_strerror(err));
423 fatal(0, "error updating database: %s", db_strerror(err));
427 /* open a database cursor */
428 DBC *trackdb_opencursor(DB *db, DB_TXN *tid) {
432 switch(err = db->cursor(db, tid, &c, 0)) {
434 default: fatal(0, "error creating cursor: %s", db_strerror(err));
439 /* close a database cursor; returns 0 or DB_LOCK_DEADLOCK */
440 int trackdb_closecursor(DBC *c) {
444 switch(err = c->c_close(c)) {
447 case DB_LOCK_DEADLOCK:
448 error(0, "error closing cursor: %s", db_strerror(err));
451 fatal(0, "error closing cursor: %s", db_strerror(err));
455 /* delete a (key,data) pair. Returns 0, DB_NOTFOUND or DB_LOCK_DEADLOCK. */
456 int trackdb_delkeydata(DB *db,
464 c = trackdb_opencursor(db, tid);
465 switch(err = c->c_get(c, make_key(&key, word),
466 make_key(&data, track), DB_GET_BOTH)) {
468 switch(err = c->c_del(c, 0)) {
474 case DB_LOCK_DEADLOCK:
475 error(0, "error updating database: %s", db_strerror(err));
478 fatal(0, "c->c_del: %s", db_strerror(err));
483 case DB_LOCK_DEADLOCK:
484 error(0, "error updating database: %s", db_strerror(err));
487 fatal(0, "c->c_get: %s", db_strerror(err));
489 if(trackdb_closecursor(c)) err = DB_LOCK_DEADLOCK;
493 /* start a transaction */
494 DB_TXN *trackdb_begin_transaction(void) {
498 if((err = trackdb_env->txn_begin(trackdb_env, 0, &tid, 0)))
499 fatal(0, "trackdb_env->txn_begin: %s", db_strerror(err));
503 /* abort transaction */
504 void trackdb_abort_transaction(DB_TXN *tid) {
508 if((err = tid->abort(tid)))
509 fatal(0, "tid->abort: %s", db_strerror(err));
512 /* commit transaction */
513 void trackdb_commit_transaction(DB_TXN *tid) {
516 if((err = tid->commit(tid, 0)))
517 fatal(0, "tid->commit: %s", db_strerror(err));
520 /* search/tags shared code ***************************************************/
522 /* comparison function used by dedupe() */
523 static int wordcmp(const void *a, const void *b) {
524 return strcmp(*(const char **)a, *(const char **)b);
527 /* sort and de-dupe VEC */
528 static char **dedupe(char **vec, int nvec) {
531 qsort(vec, nvec, sizeof (char *), wordcmp);
535 for(n = 1; n < nvec; ++n)
536 if(strcmp(vec[n], vec[m - 1]))
543 /* update a key/track database. Returns 0 or DB_DEADLOCK. */
544 static int register_word(DB *db, const char *what,
545 const char *track, const char *word,
550 switch(err = db->put(db, tid, make_key(&key, word),
551 make_key(&data, track), DB_NODUPDATA)) {
555 case DB_LOCK_DEADLOCK:
556 error(0, "error updating %s.db: %s", what, db_strerror(err));
559 fatal(0, "error updating %s.db: %s", what, db_strerror(err));
563 /* search primitives *********************************************************/
565 /* return true iff NAME is a trackname_display_ pref */
566 static int is_display_pref(const char *name) {
567 static const char prefix[] = "trackname_display_";
568 return !strncmp(name, prefix, (sizeof prefix) - 1);
571 /* compute the words of a track name */
572 static char **track_to_words(const char *track,
573 const struct kvp *p) {
577 const char *rootless = track_rootless(track);
580 rootless = track; /* bodge */
582 if((w = words(casefold(strip_extension(rootless)), &nw)))
583 vector_append_many(&v, w, nw);
585 for(; p; p = p->next)
586 if(is_display_pref(p->name))
587 if((w = words(casefold(p->value), &nw)))
588 vector_append_many(&v, w, nw);
589 vector_terminate(&v);
590 return dedupe(v.vec, v.nvec);
593 /* return nonzero iff WORD is a stopword */
594 static int stopword(const char *word) {
597 for(n = 0; n < config->stopword.n
598 && strcmp(word, config->stopword.s[n]); ++n)
600 return n < config->stopword.n;
603 /* record that WORD appears in TRACK. Returns 0 or DB_LOCK_DEADLOCK. */
604 static int register_search_word(const char *track, const char *word,
606 if(stopword(word)) return 0;
607 return register_word(trackdb_searchdb, "search", track, word, tid);
610 /* Tags **********************************************************************/
612 /* Return nonzero if C is a valid tag character */
613 static int tagchar(int c) {
622 /* Parse and de-dupe a tag list. If S=0 then assumes "". */
623 static char **parsetags(const char *s) {
629 /* skip initial separators */
630 while(*s && (!tagchar(*s) || *s == ' '))
633 /* find the extent of the tag */
635 while(*s && tagchar(*s))
637 /* strip trailing spaces */
638 while(s > t && s[-1] == ' ')
640 vector_append(&v, xstrndup(t, s - t));
641 /* skip intermediate and trailing separators */
642 while(*s && (!tagchar(*s) || *s == ' '))
646 vector_terminate(&v);
647 return dedupe(v.vec, v.nvec);
650 /* Record that TRACK has TAG. Returns 0 or DB_LOCK_DEADLOCK. */
651 static int register_tag(const char *track, const char *tag, DB_TXN *tid) {
652 return register_word(trackdb_tagsdb, "tags", track, tag, tid);
655 /* aliases *******************************************************************/
657 /* compute the alias and store at aliasp. Returns 0 or DB_LOCK_DEADLOCK. If
658 * there is no alias sets *aliasp to 0. */
659 static int compute_alias(char **aliasp,
664 const char *s = config->alias, *t, *expansion, *part;
665 int c, used_db = 0, slash_prefix, err;
667 const char *const root = find_track_root(track);
670 /* Bodge for tracks with no root */
675 dynstr_append_string(&d, root);
676 while((c = (unsigned char)*s++)) {
678 dynstr_append(&d, c);
681 if((slash_prefix = (*s == '/')))
684 assert(t != 0); /* validated at startup */
685 part = xstrndup(s, t - s);
686 expansion = getpart(track, "display", part, p, &used_db);
688 if(slash_prefix) dynstr_append(&d, '/');
689 dynstr_append_string(&d, expansion);
691 s = t + 1; /* skip {part} */
693 /* only admit to the alias if we used the db... */
698 dynstr_terminate(&d);
699 /* ...and the answer differs from the original... */
700 if(!strcmp(track, d.vec)) {
704 /* ...and there isn't already a different track with that name (including as
706 switch(err = trackdb_getdata(trackdb_tracksdb, d.vec, &at, tid)) {
708 if((s = kvp_get(at, "_alias_for"))
709 && !strcmp(s, track)) {
721 /* get track and prefs data (if tp/pp not null pointers). Returns 0 on
722 * success, DB_NOTFOUND if the track does not exist or DB_LOCK_DEADLOCK.
723 * Always sets the return values, even if only to null pointers. */
724 static int gettrackdata(const char *track,
727 const char **actualp,
729 #define GTD_NOALIAS 0x0001
732 const char *actual = track;
733 struct kvp *t = 0, *p = 0;
735 if((err = trackdb_getdata(trackdb_tracksdb, track, &t, tid))) goto done;
736 if((actual = kvp_get(t, "_alias_for"))) {
737 if(flags & GTD_NOALIAS) {
738 error(0, "alias passed to gettrackdata where real path required");
741 if((err = trackdb_getdata(trackdb_tracksdb, actual, &t, tid))) goto done;
746 if((err = trackdb_getdata(trackdb_prefsdb, actual, &p, tid)) == DB_LOCK_DEADLOCK)
751 if(actualp) *actualp = actual;
757 /* trackdb_notice() **********************************************************/
759 /** @brief notice a possibly new track
760 * @return @c DB_NOTFOUND if new, 0 if already known
762 int trackdb_notice(const char *track,
768 tid = trackdb_begin_transaction();
769 err = trackdb_notice_tid(track, path, tid);
770 if((err == DB_LOCK_DEADLOCK)) goto fail;
773 trackdb_abort_transaction(tid);
775 trackdb_commit_transaction(tid);
779 /** @brief notice a possibly new track
780 * @param track NFC UTF-8 track name
781 * @param path Raw path name
782 * @param tid Transaction ID
783 * @return @c DB_NOTFOUND if new, 0 if already known, @c DB_LOCK_DEADLOCK also
785 int trackdb_notice_tid(const char *track,
789 struct kvp *t, *a, *p;
793 /* notice whether the tracks.db entry changes */
795 /* get any existing tracks entry */
796 if((err = gettrackdata(track, &t, &p, 0, 0, tid)) == DB_LOCK_DEADLOCK)
798 ret = err; /* 0 or DB_NOTFOUND */
799 /* this is a real track */
800 t_changed += kvp_set(&t, "_alias_for", 0);
801 t_changed += kvp_set(&t, "_path", path);
802 /* if we have an alias record it in the database */
803 if((err = compute_alias(&alias, track, p, tid))) return err;
805 /* won't overwrite someone else's alias as compute_alias() checks */
806 D(("%s: alias %s", track, alias));
808 kvp_set(&a, "_alias_for", track);
809 if((err = trackdb_putdata(trackdb_tracksdb, alias, a, tid, 0))) return err;
811 /* update search.db */
812 w = track_to_words(track, p);
813 for(n = 0; w[n]; ++n)
814 if((err = register_search_word(track, w[n], tid)))
817 w = parsetags(kvp_get(p, "tags"));
818 for(n = 0; w[n]; ++n)
819 if((err = register_tag(track, w[n], tid)))
822 /* only store the tracks.db entry if it has changed */
823 if(t_changed && (err = trackdb_putdata(trackdb_tracksdb, track, t, tid, 0)))
825 if(ret == DB_NOTFOUND) {
826 uint32_t timestamp[2];
831 timestamp[0] = htonl((uint64_t)now >> 32);
832 timestamp[1] = htonl((uint32_t)now);
833 memset(&key, 0, sizeof key);
834 key.data = timestamp;
835 key.size = sizeof timestamp;
836 switch(err = trackdb_noticeddb->put(trackdb_noticeddb, tid, &key,
837 make_key(&data, track), 0)) {
839 case DB_LOCK_DEADLOCK: return err;
840 default: fatal(0, "error updating noticed.db: %s", db_strerror(err));
846 /* trackdb_obsolete() ********************************************************/
848 /* obsolete a track */
849 int trackdb_obsolete(const char *track, DB_TXN *tid) {
854 if((err = gettrackdata(track, 0, &p, 0,
855 GTD_NOALIAS, tid)) == DB_LOCK_DEADLOCK)
857 else if(err == DB_NOTFOUND) return 0;
858 /* compute the alias, if any, and delete it */
859 if(compute_alias(&alias, track, p, tid)) return err;
861 /* if the alias points to some other track then compute_alias won't
863 if(trackdb_delkey(trackdb_tracksdb, alias, tid))
866 /* update search.db */
867 w = track_to_words(track, p);
868 for(n = 0; w[n]; ++n)
869 if(trackdb_delkeydata(trackdb_searchdb,
870 w[n], track, tid) == DB_LOCK_DEADLOCK)
873 w = parsetags(kvp_get(p, "tags"));
874 for(n = 0; w[n]; ++n)
875 if(trackdb_delkeydata(trackdb_tagsdb,
876 w[n], track, tid) == DB_LOCK_DEADLOCK)
879 /* update tracks.db */
880 if(trackdb_delkey(trackdb_tracksdb, track, tid) == DB_LOCK_DEADLOCK)
882 /* We don't delete the prefs, so they survive temporary outages of the
883 * (possibly virtual) track filesystem */
887 /* trackdb_stats() ***********************************************************/
889 #define H(name) { #name, offsetof(DB_HASH_STAT, name) }
890 #define B(name) { #name, offsetof(DB_BTREE_STAT, name) }
892 static const struct statinfo {
895 } statinfo_hash[] = {
911 }, statinfo_btree[] = {
932 /* look up stats for DB */
933 static int get_stats(struct vector *v,
935 const struct statinfo *si,
944 switch(err = database->stat(database, tid, &sp, 0)) {
947 case DB_LOCK_DEADLOCK:
948 error(0, "error querying database: %s", db_strerror(err));
951 fatal(0, "error querying database: %s", db_strerror(err));
953 for(n = 0; n < nsi; ++n) {
954 byte_xasprintf(&str, "%s=%"PRIuMAX, si[n].name,
955 (uintmax_t)*(u_int32_t *)((char *)sp + si[n].offset));
956 vector_append(v, str);
962 struct search_entry {
967 /* find the top COUNT words in the search database */
968 static int search_league(struct vector *v, int count, DB_TXN *tid) {
969 struct search_entry *se;
972 int err, n = 0, nse = 0, i;
977 cursor = trackdb_opencursor(trackdb_searchdb, tid);
978 se = xmalloc(count * sizeof *se);
979 while(!(err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
981 if(word && wl == k.size && !strncmp(word, k.data, wl))
984 #define FINALIZE() do { \
985 if(word && (nse < count || n > se[nse - 1].n)) { \
990 while(i > 0 && n > se[i - 1].n) \
992 memmove(&se[i + 1], &se[i], (nse - i) * sizeof *se); \
998 word = xstrndup(k.data, wl = k.size);
1006 case DB_LOCK_DEADLOCK:
1007 error(0, "error querying search database: %s", db_strerror(err));
1010 fatal(0, "error querying search database: %s", db_strerror(err));
1012 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1015 byte_xasprintf(&str, "Top %d search words:", nse);
1016 vector_append(v, str);
1017 for(i = 0; i < nse; ++i) {
1018 byte_xasprintf(&str, "%4d: %5d %s", i + 1, se[i].n, se[i].word);
1019 vector_append(v, str);
1024 #define SI(what) statinfo_##what, \
1025 sizeof statinfo_##what / sizeof (struct statinfo)
1027 /* return a list of database stats */
1028 char **trackdb_stats(int *nstatsp) {
1034 tid = trackdb_begin_transaction();
1036 vector_append(&v, (char *)"Tracks database stats:");
1037 if(get_stats(&v, trackdb_tracksdb, SI(btree), tid)) goto fail;
1038 vector_append(&v, (char *)"");
1039 vector_append(&v, (char *)"Search database stats:");
1040 if(get_stats(&v, trackdb_searchdb, SI(hash), tid)) goto fail;
1041 vector_append(&v, (char *)"");
1042 vector_append(&v, (char *)"Prefs database stats:");
1043 if(get_stats(&v, trackdb_prefsdb, SI(hash), tid)) goto fail;
1044 vector_append(&v, (char *)"");
1045 if(search_league(&v, 10, tid)) goto fail;
1046 vector_terminate(&v);
1049 trackdb_abort_transaction(tid);
1051 trackdb_commit_transaction(tid);
1052 if(nstatsp) *nstatsp = v.nvec;
1056 struct stats_details {
1057 void (*done)(char *data, void *u);
1059 int exited; /* subprocess exited */
1060 int closed; /* pipe close */
1061 int wstat; /* wait status from subprocess */
1062 struct dynstr data[1]; /* data read from pipe */
1065 static void stats_complete(struct stats_details *d) {
1068 if(!(d->exited && d->closed))
1070 byte_xasprintf(&s, "\n"
1072 "track lookup cache hits: %lu\n"
1073 "track lookup cache misses: %lu\n",
1075 cache_files_misses);
1076 dynstr_append_string(d->data, s);
1077 dynstr_terminate(d->data);
1078 d->done(d->data->vec, d->u);
1081 static int stats_finished(ev_source attribute((unused)) *ev,
1082 pid_t attribute((unused)) pid,
1084 const struct rusage attribute((unused)) *rusage,
1086 struct stats_details *const d = u;
1090 error(0, "disorder-stats %s", wstat(status));
1095 static int stats_read(ev_source attribute((unused)) *ev,
1101 struct stats_details *const d = u;
1103 dynstr_append_bytes(d->data, ptr, bytes);
1104 ev_reader_consume(reader, bytes);
1111 static int stats_error(ev_source attribute((unused)) *ev,
1114 struct stats_details *const d = u;
1116 error(errno_value, "error reading from pipe to disorder-stats");
1122 void trackdb_stats_subprocess(ev_source *ev,
1123 void (*done)(char *data, void *u),
1127 struct stats_details *d = xmalloc(sizeof *d);
1129 dynstr_init(d->data);
1133 pid = subprogram(ev, "disorder-stats", p[1]);
1135 ev_child(ev, pid, 0, stats_finished, d);
1136 ev_reader_new(ev, p[0], stats_read, stats_error, d, "disorder-stats reader");
1139 /* set a pref (remove if value=0) */
1140 int trackdb_set(const char *track,
1142 const char *value) {
1143 struct kvp *t, *p, *a;
1146 char *oldalias, *newalias, **oldtags = 0, **newtags;
1149 /* TODO: if value matches default then set value=0 */
1153 tid = trackdb_begin_transaction();
1154 if((err = gettrackdata(track, &t, &p, 0,
1155 0, tid)) == DB_LOCK_DEADLOCK)
1157 if(err == DB_NOTFOUND) break;
1158 if(name[0] == '_') {
1159 if(kvp_set(&t, name, value))
1160 if(trackdb_putdata(trackdb_tracksdb, track, t, tid, 0))
1163 /* get the old alias name */
1164 if(compute_alias(&oldalias, track, p, tid)) goto fail;
1165 /* get the old tags */
1166 if(!strcmp(name, "tags"))
1167 oldtags = parsetags(kvp_get(p, "tags"));
1169 if(kvp_set(&p, name, value))
1170 if(trackdb_putdata(trackdb_prefsdb, track, p, tid, 0))
1172 /* compute the new alias name */
1173 if((err = compute_alias(&newalias, track, p, tid))) goto fail;
1174 /* check whether alias has changed */
1175 if(!(oldalias == newalias
1176 || (oldalias && newalias && !strcmp(oldalias, newalias)))) {
1177 /* adjust alias records to fit change */
1179 && trackdb_delkey(trackdb_tracksdb, oldalias, tid)) goto fail;
1182 kvp_set(&a, "_alias_for", track);
1183 if(trackdb_putdata(trackdb_tracksdb, newalias, a, tid, 0)) goto fail;
1186 /* check whether tags have changed */
1187 if(!strcmp(name, "tags")) {
1188 newtags = parsetags(value);
1189 while(*oldtags || *newtags) {
1190 if(*oldtags && *newtags) {
1191 cmp = strcmp(*oldtags, *newtags);
1193 /* keeping this tag */
1197 /* old tag fits into a gap in the new list, so delete old */
1200 /* new tag fits into a gap in the old list, so insert new */
1202 } else if(*oldtags) {
1203 /* we've run out of new tags, so remaining old ones are to be
1206 if(trackdb_delkeydata(trackdb_tagsdb,
1207 *oldtags, track, tid) == DB_LOCK_DEADLOCK)
1211 /* we've run out of old tags, so remainig new ones are to be
1214 if(register_tag(track, *newtags, tid)) goto fail;
1224 trackdb_abort_transaction(tid);
1226 trackdb_commit_transaction(tid);
1227 return err == 0 ? 0 : -1;
1231 const char *trackdb_get(const char *track,
1233 return kvp_get(trackdb_get_all(track), name);
1236 /* get all prefs as a 0-terminated array */
1237 struct kvp *trackdb_get_all(const char *track) {
1238 struct kvp *t, *p, **pp;
1242 tid = trackdb_begin_transaction();
1243 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1247 trackdb_abort_transaction(tid);
1249 trackdb_commit_transaction(tid);
1250 for(pp = &p; *pp; pp = &(*pp)->next)
1257 const char *trackdb_resolve(const char *track) {
1262 tid = trackdb_begin_transaction();
1263 if(gettrackdata(track, 0, 0, &actual, 0, tid) == DB_LOCK_DEADLOCK)
1267 trackdb_abort_transaction(tid);
1269 trackdb_commit_transaction(tid);
1273 int trackdb_isalias(const char *track) {
1274 const char *actual = trackdb_resolve(track);
1276 return strcmp(actual, track);
1279 /* test whether a track exists (perhaps an alias) */
1280 int trackdb_exists(const char *track) {
1285 tid = trackdb_begin_transaction();
1286 /* unusually, here we want the return value */
1287 if((err = gettrackdata(track, 0, 0, 0, 0, tid)) == DB_LOCK_DEADLOCK)
1291 trackdb_abort_transaction(tid);
1293 trackdb_commit_transaction(tid);
1297 /* return the list of tags */
1298 char **trackdb_alltags(void) {
1304 tid = trackdb_begin_transaction();
1305 err = trackdb_alltags_tid(tid, &taglist);
1307 trackdb_abort_transaction(tid);
1309 trackdb_commit_transaction(tid);
1313 static int trackdb_alltags_tid(DB_TXN *tid, char ***taglistp) {
1320 c = trackdb_opencursor(trackdb_tagsdb, tid);
1321 memset(&k, 0, sizeof k);
1322 while(!(err = c->c_get(c, &k, prepare_data(&d), DB_NEXT_NODUP)))
1323 vector_append(&v, xstrndup(k.data, k.size));
1327 case DB_LOCK_DEADLOCK:
1330 fatal(0, "c->c_get: %s", db_strerror(err));
1332 if((err = trackdb_closecursor(c))) return err;
1333 vector_terminate(&v);
1338 /* return 1 iff sorted tag lists A and B have at least one member in common */
1339 static int tag_intersection(char **a, char **b) {
1342 /* Same sort of logic as trackdb_set() above */
1344 if(!(cmp = strcmp(*a, *b))) return 1;
1345 else if(cmp < 0) ++a;
1351 /* Check whether a track is suitable for random play. Returns 0 if it is,
1352 * DB_NOTFOUND if it is not or DB_LOCK_DEADLOCK if the database gave us
1354 static int check_suitable(const char *track,
1356 char **required_tags,
1357 char **prohibited_tags) {
1361 const char *pick_at_random, *played_time;
1363 /* don't pick tracks that aren't in any surviving collection (for instance
1364 * you've edited the config but the rescan hasn't done its job yet) */
1365 if(!find_track_root(track)) {
1366 info("found track not in any collection: %s", track);
1369 /* don't pick aliases - only pick the canonical form */
1370 if(gettrackdata(track, &t, &p, 0, 0, tid) == DB_LOCK_DEADLOCK)
1371 return DB_LOCK_DEADLOCK;
1372 if(kvp_get(t, "_alias_for"))
1374 /* check that random play is not suppressed for this track */
1375 if((pick_at_random = kvp_get(p, "pick_at_random"))
1376 && !strcmp(pick_at_random, "0"))
1378 /* don't pick a track that's been played in the last 8 hours */
1379 if((played_time = kvp_get(p, "played_time"))) {
1380 last = atoll(played_time);
1382 if(now < last + 8 * 3600) /* TODO configurable */
1385 track_tags = parsetags(kvp_get(p, "tags"));
1386 /* check that no prohibited tag is present for this track */
1387 if(prohibited_tags && tag_intersection(track_tags, prohibited_tags))
1389 /* check that at least one required tags is present for this track */
1390 if(*required_tags && !tag_intersection(track_tags, required_tags))
1395 /* attempt to pick a random non-alias track */
1396 const char *trackdb_random(int tries) {
1401 const char *track, *candidate;
1404 char **required_tags, **prohibited_tags, **tp;
1409 tid = trackdb_begin_transaction();
1410 if((err = trackdb_get_global_tid("required-tags", tid, &tags)))
1412 required_tags = parsetags(tags);
1413 if((err = trackdb_get_global_tid("prohibited-tags", tid, &tags)))
1415 prohibited_tags = parsetags(tags);
1417 if(*required_tags) {
1418 /* Bung all the suitable tracks into a hash and convert to a list of keys
1419 * (to eliminate duplicates). We cache this list since it is possible
1420 * that it will be very large. */
1423 for(tp = required_tags; *tp; ++tp) {
1424 c = trackdb_opencursor(trackdb_tagsdb, tid);
1425 memset(&key, 0, sizeof key);
1427 key.size = strlen(*tp);
1429 err = c->c_get(c, &key, prepare_data(&data), DB_SET);
1431 hash_add(h, xstrndup(data.data, data.size), 0,
1432 HASH_INSERT_OR_REPLACE);
1434 err = c->c_get(c, &key, prepare_data(&data), DB_NEXT_DUP);
1440 case DB_LOCK_DEADLOCK:
1443 fatal(0, "error querying tags.db: %s", db_strerror(err));
1445 trackdb_closecursor(c);
1448 error(0, "required tag %s does not match any tracks", *tp);
1450 nreqtracks = hash_count(h);
1451 reqtracks = hash_keys(h);
1453 while(nreqtracks && !track && tries-- > 0) {
1454 r = (rand() * (double)nreqtracks / (RAND_MAX + 1.0));
1455 candidate = reqtracks[r];
1456 switch(check_suitable(candidate, tid,
1457 required_tags, prohibited_tags)) {
1463 case DB_LOCK_DEADLOCK:
1468 /* No required tags. We pick random record numbers in the database
1470 switch(err = trackdb_tracksdb->stat(trackdb_tracksdb, tid, &sp, 0)) {
1473 case DB_LOCK_DEADLOCK:
1474 error(0, "error querying tracks.db: %s", db_strerror(err));
1477 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1480 error(0, "cannot pick tracks at random from an empty database");
1481 while(sp->bt_nkeys && !track && tries-- > 0) {
1482 /* record numbers count from 1 upwards */
1483 r = 1 + (rand() * (double)sp->bt_nkeys / (RAND_MAX + 1.0));
1484 memset(&key, sizeof key, 0);
1485 key.flags = DB_DBT_MALLOC;
1486 key.size = sizeof r;
1488 switch(err = trackdb_tracksdb->get(trackdb_tracksdb, tid, &key, prepare_data(&data),
1492 case DB_LOCK_DEADLOCK:
1493 error(0, "error querying tracks.db: %s", db_strerror(err));
1496 fatal(0, "error querying tracks.db: %s", db_strerror(err));
1498 candidate = xstrndup(key.data, key.size);
1499 switch(check_suitable(candidate, tid,
1500 required_tags, prohibited_tags)) {
1506 case DB_LOCK_DEADLOCK:
1513 trackdb_closecursor(c);
1515 trackdb_abort_transaction(tid);
1517 trackdb_commit_transaction(tid);
1519 error(0, "could not pick a random track");
1523 /* get a track name given the prefs. Set *used_db to 1 if we got the answer
1524 * from the prefs. */
1525 static const char *getpart(const char *track,
1526 const char *context,
1528 const struct kvp *p,
1533 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1534 if((result = kvp_get(p, pref)))
1537 result = trackname_part(track, context, part);
1538 assert(result != 0);
1542 /* get a track name part, like trackname_part(), but taking the database into
1544 const char *trackdb_getpart(const char *track,
1545 const char *context,
1553 /* construct the full pref */
1554 byte_xasprintf(&pref, "trackname_%s_%s", context, part);
1556 tid = trackdb_begin_transaction();
1557 if((err = gettrackdata(track, 0, &p, &actual, 0, tid)) == DB_LOCK_DEADLOCK)
1561 trackdb_abort_transaction(tid);
1563 trackdb_commit_transaction(tid);
1564 return getpart(actual, context, part, p, &used_db);
1567 /* get the raw path name for @track@ (might be an alias) */
1568 const char *trackdb_rawpath(const char *track) {
1574 tid = trackdb_begin_transaction();
1575 if(gettrackdata(track, &t, 0, 0, 0, tid) == DB_LOCK_DEADLOCK)
1579 trackdb_abort_transaction(tid);
1581 trackdb_commit_transaction(tid);
1582 if(!(path = kvp_get(t, "_path"))) path = track;
1586 /* trackdb_list **************************************************************/
1588 /* this is incredibly ugly, sorry, perhaps it will be rewritten to be actually
1589 * readable at some point */
1591 /* return true if the basename of TRACK[0..TL-1], as defined by DL, matches RE.
1592 * If RE is a null pointer then it matches everything. */
1593 static int track_matches(size_t dl, const char *track, size_t tl,
1601 switch(rc = pcre_exec(re, 0, track, tl, 0, 0, ovec, 3)) {
1602 case PCRE_ERROR_NOMATCH: return 0;
1605 error(0, "pcre_exec returned %d, subject '%s'", rc, track);
1612 static int do_list(struct vector *v, const char *dir,
1613 enum trackdb_listable what, const pcre *re, DB_TXN *tid) {
1619 size_t l, last_dir_len = 0;
1620 char *last_dir = 0, *track, *alias;
1624 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1627 /* find the first key >= dir */
1628 err = cursor->c_get(cursor, &k, &d, DB_SET_RANGE);
1629 /* keep going while we're dealing with <dir/anything> */
1632 && ((char *)k.data)[dl] == '/'
1633 && !memcmp(k.data, dir, dl)) {
1634 ptr = memchr((char *)k.data + dl + 1, '/', k.size - (dl + 1));
1636 /* we have <dir/component/anything>, so <dir/component> is a directory */
1637 l = ptr - (char *)k.data;
1638 if(what & trackdb_directories)
1640 && l == last_dir_len
1641 && !memcmp(last_dir, k.data, l))) {
1642 last_dir = xstrndup(k.data, last_dir_len = l);
1643 if(track_matches(dl, k.data, l, re))
1644 vector_append(v, last_dir);
1647 /* found a plain file */
1648 if((what & trackdb_files)) {
1649 track = xstrndup(k.data, k.size);
1650 if((err = trackdb_getdata(trackdb_prefsdb,
1651 track, &p, tid)) == DB_LOCK_DEADLOCK)
1653 /* if this file has an alias in the same directory then we skip it */
1654 if((err = compute_alias(&alias, track, p, tid)))
1656 if(!(alias && !strcmp(d_dirname(alias), d_dirname(track))))
1657 if(track_matches(dl, k.data, k.size, re))
1658 vector_append(v, track);
1661 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1669 case DB_LOCK_DEADLOCK:
1670 error(0, "error querying database: %s", db_strerror(err));
1673 fatal(0, "error querying database: %s", db_strerror(err));
1676 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1680 /* return the directories or files below @dir@ */
1681 char **trackdb_list(const char *dir, int *np, enum trackdb_listable what,
1689 tid = trackdb_begin_transaction();
1692 if(do_list(&v, dir, what, re, tid))
1695 for(n = 0; n < config->collection.n; ++n)
1696 if(do_list(&v, config->collection.s[n].root, what, re, tid))
1701 trackdb_abort_transaction(tid);
1703 trackdb_commit_transaction(tid);
1704 vector_terminate(&v);
1710 /* If S is tag:something, return something. Else return 0. */
1711 static const char *checktag(const char *s) {
1712 if(!strncmp(s, "tag:", 4))
1718 /* return a list of tracks containing all of the words given. If you
1719 * ask for only stopwords you get no tracks. */
1720 char **trackdb_search(char **wordlist, int nwordlist, int *ntracks) {
1721 const char **w, *best = 0, *tag;
1722 char **twords, **tags;
1723 int i, j, n, err, what;
1733 *ntracks = 0; /* for early returns */
1734 /* casefold all the words */
1735 w = xmalloc(nwordlist * sizeof (char *));
1736 for(n = 0; n < nwordlist; ++n) {
1737 w[n] = casefold(wordlist[n]);
1738 if(checktag(w[n])) ++ntags; /* count up tags */
1740 /* find the longest non-stopword */
1741 for(n = 0; n < nwordlist; ++n)
1742 if(!stopword(w[n]) && !checktag(w[n]))
1743 if(!best || strlen(w[n]) > strlen(best))
1745 /* TODO: we should at least in principal be able to identify the word or tag
1746 * with the least matches in log time, and choose that as our primary search
1748 if(ntags && !best) {
1749 /* Only tags are listed. We limit to the first and narrow down with the
1751 best = checktag(w[0]);
1752 db = trackdb_tagsdb;
1755 /* We can limit to some word. */
1756 db = trackdb_searchdb;
1759 /* Only stopwords */
1765 tid = trackdb_begin_transaction();
1766 /* find all the tracks that have that word */
1771 cursor = trackdb_opencursor(db, tid);
1772 while(!(err = cursor->c_get(cursor, &k, &d, what))) {
1773 vector_append(&v, xstrndup(d.data, d.size));
1780 case DB_LOCK_DEADLOCK:
1781 error(0, "error querying %s database: %s", dbname, db_strerror(err));
1784 fatal(0, "error querying %s database: %s", dbname, db_strerror(err));
1786 if(trackdb_closecursor(cursor)) err = DB_LOCK_DEADLOCK;
1788 /* do a naive search over that (hopefuly fairly small) list of tracks */
1790 for(n = 0; n < v.nvec; ++n) {
1791 if((err = gettrackdata(v.vec[n], 0, &p, 0, 0, tid) == DB_LOCK_DEADLOCK))
1794 error(0, "track %s unexpected error: %s", v.vec[n], db_strerror(err));
1797 twords = track_to_words(v.vec[n], p);
1798 tags = parsetags(kvp_get(p, "tags"));
1799 for(i = 0; i < nwordlist; ++i) {
1800 if((tag = checktag(w[i]))) {
1801 /* Track must have this tag */
1802 for(j = 0; tags[j]; ++j)
1803 if(!strcmp(tag, tags[j])) break; /* tag found */
1804 if(!tags[j]) break; /* tag not found */
1806 /* Track must contain this word */
1807 for(j = 0; twords[j]; ++j)
1808 if(!strcmp(w[i], twords[j])) break; /* word found */
1809 if(!twords[j]) break; /* word not found */
1812 if(i >= nwordlist) /* all words found */
1813 vector_append(&u, v.vec[n]);
1817 trackdb_closecursor(cursor);
1819 trackdb_abort_transaction(tid);
1820 info("retrying search");
1822 trackdb_commit_transaction(tid);
1823 vector_terminate(&u);
1829 /* trackdb_scan **************************************************************/
1831 int trackdb_scan(const char *root,
1832 int (*callback)(const char *track,
1840 const size_t root_len = root ? strlen(root) : 0;
1845 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
1847 err = cursor->c_get(cursor, make_key(&k, root), prepare_data(&d),
1850 memset(&k, 0, sizeof k);
1851 err = cursor->c_get(cursor, &k, prepare_data(&d),
1856 || (k.size > root_len
1857 && !strncmp(k.data, root, root_len)
1858 && ((char *)k.data)[root_len] == '/')) {
1859 data = kvp_urldecode(d.data, d.size);
1860 if(kvp_get(data, "_path")) {
1861 track = xstrndup(k.data, k.size);
1862 /* Advance to the next track before the callback so that the callback
1863 * may safely delete the track */
1864 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1865 if((cberr = callback(track, data, u, tid))) {
1870 err = cursor->c_get(cursor, &k, &d, DB_NEXT);
1874 trackdb_closecursor(cursor);
1881 case DB_LOCK_DEADLOCK:
1882 error(0, "c->c_get: %s", db_strerror(err));
1885 fatal(0, "c->c_get: %s", db_strerror(err));
1889 /* trackdb_rescan ************************************************************/
1891 /* called when the rescanner terminates */
1892 static int reap_rescan(ev_source attribute((unused)) *ev,
1895 const struct rusage attribute((unused)) *rusage,
1896 void attribute((unused)) *u) {
1897 if(pid == rescan_pid) rescan_pid = -1;
1899 error(0, "disorderd-rescan: %s", wstat(status));
1901 D(("disorderd-rescan terminate: %s", wstat(status)));
1902 /* Our cache of file lookups is out of date now */
1903 cache_clean(&cache_files_type);
1904 eventlog("rescanned", (char *)0);
1908 void trackdb_rescan(ev_source *ev) {
1909 if(rescan_pid != -1) {
1910 error(0, "rescan already underway");
1913 rescan_pid = subprogram(ev, RESCAN, -1);
1914 ev_child(ev, rescan_pid, 0, reap_rescan, 0);
1915 D(("started rescanner"));
1919 int trackdb_rescan_cancel(void) {
1920 if(rescan_pid == -1) return 0;
1921 if(kill(rescan_pid, SIGTERM) < 0)
1922 fatal(errno, "error killing rescanner");
1927 /* global prefs **************************************************************/
1929 void trackdb_set_global(const char *name,
1937 tid = trackdb_begin_transaction();
1938 if(!(err = trackdb_set_global_tid(name, value, tid)))
1940 trackdb_abort_transaction(tid);
1942 trackdb_commit_transaction(tid);
1943 /* log important state changes */
1944 if(!strcmp(name, "playing")) {
1945 state = !value || !strcmp(value, "yes");
1946 info("playing %s by %s",
1947 state ? "enabled" : "disabled",
1949 eventlog("state", state ? "enable_play" : "disable_play", (char *)0);
1951 if(!strcmp(name, "random-play")) {
1952 state = !value || !strcmp(value, "yes");
1953 info("random play %s by %s",
1954 state ? "enabled" : "disabled",
1956 eventlog("state", state ? "enable_random" : "disable_random", (char *)0);
1958 if(!strcmp(name, "required-tags"))
1962 int trackdb_set_global_tid(const char *name,
1968 memset(&k, 0, sizeof k);
1969 memset(&d, 0, sizeof d);
1970 k.data = (void *)name;
1971 k.size = strlen(name);
1973 d.data = (void *)value;
1974 d.size = strlen(value);
1977 err = trackdb_globaldb->put(trackdb_globaldb, tid, &k, &d, 0);
1979 err = trackdb_globaldb->del(trackdb_globaldb, tid, &k, 0);
1980 if(err == DB_LOCK_DEADLOCK) return err;
1982 fatal(0, "error updating database: %s", db_strerror(err));
1986 const char *trackdb_get_global(const char *name) {
1992 tid = trackdb_begin_transaction();
1993 if(!(err = trackdb_get_global_tid(name, tid, &r)))
1995 trackdb_abort_transaction(tid);
1997 trackdb_commit_transaction(tid);
2001 int trackdb_get_global_tid(const char *name,
2007 memset(&k, 0, sizeof k);
2008 k.data = (void *)name;
2009 k.size = strlen(name);
2010 switch(err = trackdb_globaldb->get(trackdb_globaldb, tid, &k,
2011 prepare_data(&d), 0)) {
2013 *rp = xstrndup(d.data, d.size);
2018 case DB_LOCK_DEADLOCK:
2021 fatal(0, "error reading database: %s", db_strerror(err));
2025 /** @brief Retrieve the most recently added tracks
2026 * @param ntracksp Where to put count, or 0
2027 * @param maxtracks Maximum number of tracks to retrieve
2028 * @return null-terminated array of track names
2030 * The most recently added track is first in the array.
2032 char **trackdb_new(int *ntracksp,
2038 tid = trackdb_begin_transaction();
2039 tracks = trackdb_new_tid(ntracksp, maxtracks, tid);
2042 trackdb_abort_transaction(tid);
2044 trackdb_commit_transaction(tid);
2048 /** @brief Retrieve the most recently added tracks
2049 * @param ntracksp Where to put count, or 0
2050 * @param maxtracks Maximum number of tracks to retrieve, or 0 for all
2051 * @param tid Transaction ID
2052 * @return null-terminated array of track names, or NULL on deadlock
2054 * The most recently added track is first in the array.
2056 static char **trackdb_new_tid(int *ntracksp,
2062 struct vector tracks[1];
2064 vector_init(tracks);
2065 c = trackdb_opencursor(trackdb_noticeddb, tid);
2066 while((maxtracks <= 0 || tracks->nvec < maxtracks)
2067 && !(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_PREV)))
2068 vector_append(tracks, xstrndup(d.data, d.size));
2070 case 0: /* hit maxtracks */
2071 case DB_NOTFOUND: /* ran out of tracks */
2073 case DB_LOCK_DEADLOCK:
2074 trackdb_closecursor(c);
2077 fatal(0, "error reading noticed.db: %s", db_strerror(err));
2079 if((err = trackdb_closecursor(c)))
2080 return 0; /* deadlock */
2081 vector_terminate(tracks);
2083 *ntracksp = tracks->nvec;
2087 /** @brief Expire noticed.db
2088 * @param earliest Earliest timestamp to keep
2090 void trackdb_expire_noticed(time_t earliest) {
2094 tid = trackdb_begin_transaction();
2095 if(!trackdb_expire_noticed_tid(earliest, tid))
2097 trackdb_abort_transaction(tid);
2099 trackdb_commit_transaction(tid);
2102 /** @brief Expire noticed.db
2103 * @param earliest Earliest timestamp to keep
2104 * @param tid Transaction ID
2105 * @return 0 or DB_LOCK_DEADLOCK
2107 static int trackdb_expire_noticed_tid(time_t earliest, DB_TXN *tid) {
2115 c = trackdb_opencursor(trackdb_noticeddb, tid);
2116 while(!(err = c->c_get(c, prepare_data(&k), prepare_data(&d), DB_NEXT))) {
2118 when = (time_t)(((uint64_t)ntohl(kk[0]) << 32) + ntohl(kk[1]));
2119 if(when >= earliest)
2121 if((err = c->c_del(c, 0))) {
2122 if(err != DB_LOCK_DEADLOCK)
2123 fatal(0, "error deleting expired noticed.db entry: %s",
2129 if(err == DB_NOTFOUND)
2131 if(err && err != DB_LOCK_DEADLOCK)
2132 fatal(0, "error expiring noticed.db: %s", db_strerror(err));
2134 if((err = trackdb_closecursor(c))) {
2135 if(err != DB_LOCK_DEADLOCK)
2136 fatal(0, "error closing cursor: %s", db_strerror(err));
2140 info("expired %d tracks from noticed.db", count);
2144 /* tidying up ****************************************************************/
2146 void trackdb_gc(void) {
2150 if((err = trackdb_env->txn_checkpoint(trackdb_env,
2151 config->checkpoint_kbyte,
2152 config->checkpoint_min,
2154 fatal(0, "trackdb_env->txn_checkpoint: %s", db_strerror(err));
2155 if((err = trackdb_env->log_archive(trackdb_env, &logfiles, DB_ARCH_REMOVE)))
2156 fatal(0, "trackdb_env->log_archive: %s", db_strerror(err));
2157 /* This makes catastrophic recovery impossible. However, the user can still
2158 * preserve the important data by using disorder-dump to snapshot their
2159 * prefs, and later to restore it. This is likely to have much small
2160 * long-term storage requirements than record the db logfiles. */
2168 indent-tabs-mode:nil